Woven fabric.



R. A. HAMMOND.

` WOVEN FABRIC. APPLICATION FILED SEPI-2.5. 190B.

Patented July 6, 1909.

UNITED STATES PATENT OFFICE.

ROBERT A. HAMMOND, OF SANDWICH, MASSACHUSETTS.

WOVEN FABRIC.

Specification of Letters Patent.

Patented July 6, i909.

Application led September 5, 1908. Serial No. 451,866.

of January 15, 1907, in which a series of parallel, longitudinalstrands, each composed of a plurality of wires twisted together andserved with marline, are united by similar transverse strands interwovenwith them. Such devices possess well recognized merits with regard tostrength, durability, and frictional transmitting capacity, but alsohave certain disadvantages. For example,v the patentees wires making upI n n n each strand, because of thelr twlst, incur acompound bending`action across their com- Eanions which -is liable to result in theirreakage; the roughness of the twisted surfac'eto some extent `cuts thecovering; and the sharply rounded surface of the longitudinal strandsproduces intermediate depres-v sions Which decrease the effectivefrictional surface.

The objectl of the present invention is to overcome these difficulties,and to providek a still more durable and efficient device.

In the accompanying-drawing forming a part of this specification, Figure1 is a front elevation of a ortion of one embodiment of my invention;ig. 2 is a longitudinal section therethrough on the line 2--2 Fig. 1;and

' Fig. Sis an enlarged transverse section on the line 3-3 of Fig. 1.

Similar characters are applied to like parts in the several figures ofthe drawing.

The letter A designates a member extending longitudinally of my improvedtension device, and consisting of a central portion or core 10 and acovering 11. The core is pref-,

erably provided by a flat wire, of any desired metal, and which is in.section of the eneral form of a arallelogram; that is, having oppositepara lel plane surfaces 10a-40a and symmetrically disposed ends IOL-10b,which are, however, slightly curved so that 1 they merge gradually intothe plane surfaces.

One dimenslon of this section, that between the curved ends, is greaterthan any other transverse dimension of the wire. The covering 11 may beof any suitable yieldable material, but is preferably of a fibrouscharacter and waterproof. M arline Wound closely over the wire isexcellent i" or this purpose. The longitudinal strands A are arranged ina series side by side, usually in a single layer, with their maximumdimensions or diameters lying in the same plane across the width of thedevice, and with the curved surfaces of adjacent strands in proximity to'one another.

The strandsA are maintained in their correct relation to form a flatrope or belt, b'y transversemembers or strands B interwoven with them,and each conveniently consisting of a core 12 of single round wire,having a covering 13 of the same material as the longitudinal strands.The manner in which I prefer to weave together or connect the members isclearly shown in the drawing, where it will be seen that there are twoof the transverse strands crossing the device in opposite directions,and passing upon opposite sides of successive strands A. In the crossingthe strandsB parallel one another, with their intersections at theoutside ol the devlce adjacent to thev outer members A. The retainingstrands are thus protected from wear by the longitudinal strands, thelatter wholly furnishing the working or friction surface. Moreover, theintersection ot the cross strands at the edge of the device adds to itsthickness only that of a single strand, and these cross strands are notforced against and do not wear one another.

Obviously, the devicepresents a large portion of its totalarea forcontact with a pulley or like member, for not only do the flat Wiresfurnish considerable uninterrupted friction surface transversely of thedevice, but the space between their curved edges is so slight that inuse it is so filled by the covering that the surface is practicallycontinuous. In

neither set of strands are there sharp proj ections to cut the covering,and the fact that each strand contains vbut one Wire, bending always inthe same direction over a pulley,

reduces the tendencv of the metal to crysbelt for the transmissiona ofpower and like purposes comprising longitudinal strands of wire havingflat working faces, transverse retainin Wire strands interwoven With thelongitudinal strands and crossing the flat faces thereof, and a coveringof yieldable material enveloping each of the strands.

2. A. fabric adapted for use as a-rope or belt for the transmission ofpower and like pnrposes comprising longitudinal strands of vwlre havingfiat Working faces of greater width than the thickness of the wire,interwoven transverse retaining strands, and a covering of yieldablematerial enveloping each of the strands.

3. A flat rope or belt comprising longitudi nal strands having flatworking faces and curved edges adjacent to one another in successivestrands, interwoven retaining strands crossing said nat races and passinbetween the curved ed es, and a covering o yieldable material enve opingeach of the strands.

4. A fabric adapted for use as a ro e or belt for the transmission ofower an like purposes comprising 'longitu 'nal strands of Wire havingflat Working faces, and transverse retaining strands interwoven Withthelongitudinal strands, all the strands of the fabric presenting asurfaceof yieldable mav teiial for contact with the associated strands. Sivnedat'Boston, in the county of Suffolk and tate of Massachusetts, thisYthird day of September, 1908.

ROBERT A, HAMMoND.

Witnesses: f

ROBERT T. BRADY, Lor'rin CURRIE.

